A car with a tune probably won't have more carbon/soot than a D driven by a "normal" driver because the car with the tune will likely experience a lot more WOT time and burn off much of that carbon/soot. But of course that's still worse than stock D driven very hard.

When I test drove my D, both rear tires were bald. The dealer installed new tires as part of the deal. I knew I would drive the car at least as hard as the guy who previously owned it so it didn't bother me. The car obviously logged a lot of WOT time so carbon hopefully wouldn't be an issue and hasn't been so far.

Yeah I do try to drive hard as much as possible. Going to do a walnut blasting procedure when I reach 50K miles to ease my mind and wallet for the future. Still going to jump on a extended warranty too.